Which cell organelle controls most of the activities of a cell?

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which cell organelle controls most of the activities of a cell.

2. **Understand Cell Organelles**: Familiarize yourself with the various organelles within a cell, such as the nucleus, mitochondria, endoplasmic reticulum, and others.

3. **Focus on the Nucleus**: The nucleus is known as the control center of the cell. It contains the cell's genetic material (DNA) which is essential for regulating cell activities.

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